The escalating concern over air pollution from crop stubble burning necessitates responsible biomass disposal. In our study, the characterisation studies of cotton stalk were done to assess the feasibility of this agriculture waste to be utilized for biochar production and design the continuous biochar unit. The experiment done at the Department of Unconventional Energy Sources and Electrical Engineering, College of Agricultural Engineering and Technology, Dr. PDKV, Akola during years 2021-2023. Proximate analysis revealed a varying bulk density (147.2 - 215.8 kg/m3) and moisture content (7.56-10.1%), while ultimate analysis unveiled diverse compositions, including cellulose (20-38%), hemicellulose (11-26%), and lignin (16-29%). The thermogravimetric analysis was done to study the degradation temperature of the cotton stalk with different heating rate viz. 10, 20, 30 and 40 ℃/min. The X-ray diffraction spectroscopy and Fourier transformation infrared spectroscopy was done for the cotton stalk to analyse the crystallinity and the biochemical composition of the cotton stalk. The results show that the good quality biochar can be prepared by using the low to medium temperature pyrolysis technique from the cotton stalk. The maximum degradation temperature for the cotton stalk was found to be around 450℃. The XRD and FT-IR analysis confirms the presence of the hemicellulose, cellulose and lignin in the cotton stalk which are the main precursor of the biochar production.